Abstract: A trajectory plan creation assistance method for assisting creation of a trajectory plan acquires shape data of the manufacturing object, decomposes a three-dimensional shape model based on the shape data into a plurality of linear models each having a polygonal vertical cross section in a longitudinal direction, sets a bead formation locus for forming the weld bead along the linear model and the bead formation trajectory including a lamination order of the weld bead, generates a plurality of polygonal columnar unit blocks by dividing the linear model into unit lengths along the set bead formation locus, and creates the trajectory plan by simulating the formation of the weld bead for each of the unit blocks by simulation.

Abstract: A target shape is set from a three-dimensional shape data of an additively-manufactured object, and the set target shape is sliced into a plurality of bead models having shapes corresponding to weld beads. A dripping amount of a filler metal to a lower layer during bead formation in a bead deposition portion where the sliced bead models overlap vertically is predicted according to welding conditions of the weld beads. A bead height of each bead model in the bead deposition portion is modified according to the predicted dripping amount. A deposition plan to manufacture the additively-manufactured object is created by using the plurality of bead models including the bead model with modified bead height.

Abstract: A control information generating device includes: a manufacturing information acquisition unit configured to acquire information on manufacturing paths; a connection position specifying unit configured to specify, from the acquired information on the manufacturing paths, connection positions at which a pair of manufacturing paths arranged adjacent to each other and having continuous formation order are connected to each other; a path connection unit configured to newly add a connection path that connects the pair of manufacturing paths to each other at the connection positions, and connect the pair of manufacturing paths to each other; and a control information output unit configured to repeat connection between the manufacturing paths until the number of the manufacturing paths becomes equal to or less than a predetermined upper limit, and output the information on the connected manufacturing paths as the control information.

Abstract: A quality control method for an additively manufactured object includes: acquiring a limit value of a stress intensity factor of the additively manufactured object; obtaining an allowable defect dimension of a defect present in the additively manufactured object by using a variation range of a load stress assumed in design of the additively manufactured object and a condition value including the limit value; setting, as a defect dimension, any one of a predicted value of a defect dimension of a defect that is capable of being generated in the additively manufactured object when the additively manufactured object is manufactured based on the building plan and a measured value of a defect dimension of a defect generated in a test specimen manufactured based on the building plan; and comparing the defect dimension with the allowable defect dimension to determine quality of the beads or the additively manufactured object.

Abstract: A control information generation device includes: a coordinate information acquisition unit configured to acquire coordinate information on a plurality of passing points in a path; a movement amount calculation unit configured to set a repulsion force applied to adjacent passing points among the passing points, and obtain, when the set repulsion force is applied to the passing point, a movement amount of the passing point from a position before the repulsion force is applied to a position where the passing point is in dynamic equilibrium by calculation for the plurality of passing points; a path update unit configured to update the path by correcting coordinates of the plurality of passing points according to the movement amount; and a control information output unit configured to output information on the updated path.

Abstract: A trajectory plan creation assistance method for assisting creation of a trajectory plan acquires shape data of the manufacturing object, decomposes a three-dimensional shape model based on the shape data into a plurality of linear models each having a polygonal vertical cross section in a longitudinal direction, sets a bead formation locus for forming the weld bead along the linear model and the bead formation trajectory including a lamination order of the weld bead, generates a plurality of polygonal columnar unit blocks by dividing the linear model into unit lengths along the set bead formation locus, and creates the trajectory plan by simulating the formation of the weld bead for each of the unit blocks by simulation.

Abstract: An additive manufacturing method includes dividing a three-dimensional model shape into a plurality of layers, and dividing each divided layer into a plurality of bead models. A trapezoidal bead model has four vertices. The dividing into the plurality of bead models includes, in the same layer, the bead model for a previously formed weld bead and the bead model for a subsequently formed weld bead that is adjacent to the previously formed weld bead are arranged to have an overlapping portion, and among four vertices of the bead model for the subsequently formed weld bead, selecting as a selected vertex the vertex positioned at an end of the bottom line of the bead model, the end being away from the overlapping portion, and rotating the other three vertices about the selected vertex to change a shape of the trapezoidal bead model.

Abstract: A target shape is set from a three-dimensional shape data of an additively-manufactured object, and the set target shape is sliced into a plurality of bead models having shapes corresponding to weld beads. A dripping amount of a filler metal to a lower layer during bead formation in a bead deposition portion where the sliced bead models overlap vertically is predicted according to welding conditions of the weld beads. A bead height of each bead model in the bead deposition portion is modified according to the predicted dripping amount. A deposition plan to manufacture the additively-manufactured object is created by using the plurality of bead models including the bead model with modified bead height.